Claudia shows MIB the people he came from, tells him who he is

Jacob and Man In Black are hanging out by some trees playing the Senet game. Jacob makes a move and MIB tells him that he can't do it because it's against the rules. Jacob says that MIB made the rules though. MIB responds saying "One day, you can make up your own game and everyone else will have to follow your rules." That seems to be what happened for the next few thousand years or so.

Suddenly, MIB looks up and sees Claudia standing in a pool of light. She says "It's alright, don't be afraid." Jacob turns to see what he's looking at and sees nothing. MIB is stunned and gets up and leaves Jacob, telling him that he'll meet him later.

Moments later in the jungle, MIB finds Claudia standing in a pool of light again. He asks her why Jacob couldn't see her and she tells him that it's because she's dead. She asks him to come with her so she can show him where he came from, which is a place across the island he has never seen.

MIB follows her across the island to a hill overlooking a village of people living in grass huts who are active performing various daily activities. MIB asks Claudia who they are and she tells him that they came to the island 13 years ago, the day before MIB was born. She says their ship wrecked here during a storm, and MIB asks what a ship is. She explains that it is something people use to get from one place to another and that his people came from across the sea. MIB objects, saying that's not true, since we saw earlier Mother told him that there was nothing across the sea.

Claudia reveals to him that she is his real mother and you can see anguish, but mostly anger come across MIB's face.

It's interesting that MIB, prior to becoming the smoke monster, is able to see the dead on the island. Is he like Hurley and can just see and talk to the dead or is it possible that Claudia is an earlier incarnation of the monster MIB later becomes? Either way, learning the truth about himself sets MIB on a path that he'll continue to follow for thousands of years.

Claudia gives birth to Jacob & the Man In Black, Mother kills her with a rock

At the caves, Mother sits with a mortar and pestle, grounding up something to help Claudia's wounds. Claudia is eating some food and asks where the rest of Mother's people are, and Mother says that it is just her. Claudia asks how she got to the island and other says the same way she did, by accident. Claudia starts to ask "How long have you..." and Mother interrupts her and says "Every question I answer will simply lead to another question."

Claudia says there were other people on her ship and Mother suddenly interrupts her and says if there are other people on the island, she will find them. Claudia then starts to wince in pain as the baby starts coming.

Some time passes and Mother is helping Claudia give birth to her baby. After struggling, the baby is born and Claudia says that his name is Jacob. Mother sits him on a blanket and looks at him happily. Then, Claudia starts struggling again and Mother looks concerned. She discovers that there is another baby that she is giving birth to. After the other baby is born, Claudia says she only picked one name, so the Man In Black still has no name.

Both babies are laying next to each other, Jacob wrapped in a white blanket and the Man In Black in a black blanket. Also, Jacob is calm and looking around, while the Man In Black in crying.

Claudia asks to see the babies, then Mother moves over her and says "I'm sorry." She then bludgeons Claudia to death with a rock. We hear the repeated blows as we look at the two babies.

So it seems that Fake Locke wasn't completely lying about when he told Kate that he had a crazy mother, and we see more of that later in the episode.

Claudia washes up on the island, Mother finds her at the stream

"Across the Sea" opens on some wooden wreckage floating in the Ocean. A woman named Claudia surfaces a grabs a floating piece of wreckage. She looks behind her and sees the island not too far away.

We next see her laying on the beach where she is awoken by the the water coming in. She stands up supporting her belly, and we can see that she is pregnant, and quite far along.

Next, we see her making her way to a stream in the jungle and goes to drink some water. She sees a reflection in the water and is startled. She looks up to see the nameless character referred to as Mother. In Latin, Mother offers to help her since she is hurt. Claudia is frightened, but then thanks. her.